NDA CHEMISTRY QUIZ - 27

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Question 1:

When copper powder is heated it gets coated with black copper oxide. In this reaction

Question 2:

Consider the reaction -

2NO + 2CO -------> N2 + 2CO2

Which chemical species is reduced in the reaction?

Question 3:

A substance which oxidized itself and reduces other is known as-

Question 4:

In rancidity , smell and taste of food changes. In this process fats and oil are

Question 5:

Oxidation involves addition of oxygen or loss of electrons. The harmful effects of oxidation are

  1. Respiration
  2. Photosynthesis
  3. Corrosion 
  4. Rancidity

Question 6:

Take about 1g CaCO3 in a test tube. Heat it over a flame, when a colorless gas comes out. The reaction is called a-

Question 7:

When the gas sulphur dioxide reacts with hydrogen sulphide, result in formation of water and sulphur. In this reaction sulphur dioxide acts as- 

Question 8:

Consider the reaction between sodium and chlorine-

Cl2+2Na ----->2NaCl 

Which chemical species is oxidized in the reaction?

Question 9:

Formation of hydrochloric acid from hydrogen gas and chlorine gas is a type of redox reaction. This shows that a redox reaction is one in which

Question 10:

Gain of electrons occurs during

serach-testwale
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